Mass of adsorbent/conc. of Cr (III) ion

Thermodynamic parameter

ΔH^* (J/mol)

A^*

ΔH_r (J/mol)

1 g, 0.1 M

−12.98

0.008

−7.56

1.5 g, 0.1 M

−13.91

0.0066

−6.32

2 g, 0.1 M

−14.15

0.007

−4.62

1 g, 0.2 M

−8.26

0.07

−4.62

1.5 g, 0.2 M

−9.39

0.05

−6.16

2 g, 0.2 M

−9.31

0.056

−6.55

1 g, 0.3 M

−6.9

0.156

−4.59

1.5 g, 0.3 M

−7.4

0.137

−6.73

2 g, 0.3 M

−7.48

0.142

−7.06